- YACHT CLUB LESKOVEC, z.s.
- YACHT CLUB REGENT z.s.
- Yacht club Santa Maria v likvidaci
- Youth and World z. s.
- Y-Club, z.s.
- you connected, z.s.
- Yacht Club Kozmice - občanské sdružení
- Yvontek, z.s. v likvidaci
- YAMAMOTO Czech z.s.
- YACHT CLUB Vysoké Mýto z.s.
- Yoga Ostrava, z.s.
- Youth For Christ Immanuel, z.s.
- YACHTCLUB PETROV z.s., v likvidaci
- Yak55 Aerobatic Team z.s.
- Yacht Club Poseidon Praha z. s.
- YACHT CLUB Chrášťany z.s.
- Yacht klub Junior Praha
- Yacht club ČSA, v likvidaci
- Youth Europa Czechia z.s.
- Youth z.s.
- Yacht club Lipno z.s.
- Yoga Surya International, z.s.
- Yorkshire Terrier klub chovatelů a jeho přátel, z.s.
- YMCA Neveklov "v likvidaci"
- YES o.s.
- Yacht club Letovice
- Yoga Therapy Praha, z. s.
- YPJ Evropa, z.s. v likvidaci
- YounGuns Brno, z.s.
- Young Czech Arbitration Professionals, z.s.
- YMCA Ostrava-Poruba
- Yale Model Government Europe CZ, o. s.
- Yoda Mentorship Programme, z.s.
- YEAH, z.s.
- Y.C. Markop FL, z.s.
- Yankee and Confederate Artillery Club Y.A.K.A.C.
- Yacht club Slezská Harta z.s.
- Yoga House, z.s.
- YACHT club Jablonec n.Nisou
- Yamka Minigolfclub Butovice, z. s.
- Yangame Gym
- YACHT CLUB MILEVSKO z.s.
- Yachtmeni, z.s.
- Yacht Club Baník Most z. s.
- Yogadana, z.s.
- Youth Business Network
- Young snipers team, z.s. "v likvidaci"
- YAGANA Lucky zone, z.s.
- Yellow Hills z. s.
- Youth Progress, z.s.